4PCS 50mm 5015 Blower 24V Dual Ball Bearing 1000mm/39in Cable for 3D Printer Cooling Fan and Turbine Turbo Brushless Blower

I needed some fans quick so I choose to order on Amazon rather than Aliexpress. These fans were notably quieter than some Aliexpress fans of similar specs I ordered years ago, interestingly enough I found some same spec fans like these for half the price on Aliexpress recently so I am going to try those out.

Used these to upgrade my Monoprice Maker Ultimate, which uses 24v fans. They didn't initially work, but swapping the hot and neutral wires in the plug got it to work. They spin nice and quietly, and the cooling is great!

These blower-style fans work well. I'm not using them for a 3D printer. For my cooling application I would say they blow sufficient air, but not a lot of air. I'd like to share that I believe they are DC brush motor fans (not brushless) and they are easy to speed control by the voltage you apply. They should also work well with PWM speed control. They draw only half the power stated which is a nice thing. They are very quiet, but do have a small amount of vibration if that matters to you.

Simple, solid color, quiet operation, powerful airflow. Helped me so much with an overheating moto monster control board. Just placing this on the top of the chip was enough to prevent thermal protection from kicking on.

Works well for sure but they don't last long on my 3D Printer. The first one finally died about a month but the second one out of the bunch died within a few days. Now I'm left with two and going to be looking for other brands.

Fine, quiet enough high throughput fan for little money.In case you buy a 12 v instead of a 24v as I did for my ender 3 pro, you can stick a 130 ohm resistor in series with the fan to make them work, you will immediately smoke the motor otherwise.Also on the ender 3 the mounting holes don't line up, but the surface is easily gluable so no problem there.

As others have noted several different brands of these fans, it was wire backwards. That was easy enough to fix but not the airflow. The 5v fans I bought on accident move more air than these. I didn't test, but they are so weak they might be 24v fans labelled incorrectly. They are quiet only because they barely move air.

I bought 30 of these for my 14 printers and they last about a month or two before they stopped working. Typically side fans will last me about 6 months

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